conformist said:

There is only one way to really find out and that will cost you all of one agar plate. Hold one open in front of it for about five seconds and see if you show any contaminants. If not I'd go for it. I would just avoid doing any large scale projects until you have a few small ones to prove the system. Give it a shot.

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from here.

Very good attitude and wasn't quick to dismiss possibilities. I like your style